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. 2023 Nov 10;102(45):e34502. doi: 10.1097/MD.0000000000034502

Figure 8.

Figure 8.

A keyword network visualization map. Each node represents a keyword and the size of the node presents the number of that keyword. The thickness of the lines indicates the intensity of the relationship PHN between the regions/countries, which are represented by the connections between the nodes. The gray ring in the inner circle represents publications from the earliest year, while the red ring in the outer circle represents publications from the most recent year.